Concrete Calculator & Rebar

Know exactly how much concrete and how many bags to buy before you pour. Enter your dimensions once and get instant volume, weight, and bag counts — no guesswork, no wasted trips to the yard. Built for slabs, footings, columns, walls, round pours, and stair flights, with metric and imperial units side by side. KEY FEATURES • Six pour shapes — slab, footing, column, wall, round, and stairs • Bag calculator for cement-only bags or ready-mix bags, by your exact bag size • Rebar spacing estimator ...